复合保温技术在冬季施工中的应用

Composite Insulation Technology Applied in Winter Construction

混凝土强度高低和增长速度决定于水泥水化热反应程度和速度,温度愈低,水化热反应速度愈慢,相应混凝土强度愈低。在冬季浇筑后混凝土常遭受冻结,强度损失大小随浇筑受冻早晚情况不同而异。采取一定措施防止混凝土过早受冻,使砼达到一定"临界强度"能减少冻害对混凝土强度和耐久性造成的不良影响。

The level and growth rate of concrete strength depends on the degree of cement hydration reaction and speed.And lower temperature,the slower rate of hydration heat of reaction,corresponding to the lower concrete strength.Concrete pouring in the winter,it＇s vulnerable to freezing.With frozen at different times,strength loss is different.Taking measures to prevent premature freezing to make the concrete up to a ＂critical strength＂,it can reduce the damage about strength and durability of concrete caused by low temperature.